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Modeling, optimization and experimental characterization of the dynamic behavior...

Due to recent advances in automated manufacturing technology, the so-called tow-steered laminates, in which the fibers in the layers are deposited following arbitrary curvilinear paths, have become viable. This extends the possibilities of improving the performance of composite structures in terms of bending, buckling, vibration and aeroelastic behavior, as compared to traditional unidirectional laminates. Nonetheless, the development of adequate modeling techniques and experimental validation are still necessary. In this context, the author reviews studies devoted to the dynamics of tow-steered composite plates, encompassing: a)  development of Rayleigh-Ritz and Finite Element Models accounting for arbitrary fiber trajectories; b) optimization of the dynamic and aeroelastic behavior accounting for manufacturing constraints and uncertainties in local fiber orientations;  c) influence of fiber steering on damping; d) manufacturing and experimental testing. The results demonstrate the improved behavior of optimized tow-steered composite plates as compared to traditional unidirectional counterparts, and the necessity of appropriate managing of uncertainties and manufacturing-induced defects in the numerical models. 
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